Rest for engfne-lathes



lPaterson ring made in two or more parts with certain `o'r itsequivalent and-a like'v number f slides which the frame B is v same boltc t-which 'll ens that irml 'and again fastened by means of thefbolt d.

UNITED STATES PATENT cOFFICEe HENRY MoRRIsoN, oE PATERsoN, NEW JERSEY.

REST Fo4 R- ENGIN E-LATH Es.

I, A Specification forminglpartfof-Iietters No. 3,?I99, dated October1., 1861.

Toa/ZZ whom zit/may concern:

Be it known that I, HENRY MORRISON, of in the county of Passaic andState of New Jersey, have invented a certain new and Improved Rest forEngine-Lathes; and I do hereby declare that the following is la full andaccurate description thereof, reference being had to the accompanyingdrawings, in which- ,p

Figure l is 'a side elevation. Fig. 2

w of the opposite side, and Fi similar vie o,

is a vertical section.

Similar letters refer to like parts in all the figures.

The nature of my inventionconsists in the combination and arrangement ofa frame and movable cams operated by meansv of a worm or bearings insuch a manner that a portion:- may-be readily removed and the ,Wholeopened for the purpose of inserting .the Work, and when replaced be inthe proper condition for'- operation without the use of4 other'fastening than suicient to hold theframe in position. By thisarrangement I ain enabled to use a se1f-centering rest upon. the necksof 'shafts and in similar places wheresuch rests as heretoforeconstructed have been -impracticable.

To enable others skilled in the art to make and use my invetion,`l willproceed to describe its construction and operation-by the aid of thedrawings, and the letters of referencemarked thereon. f l Ais the base,adapted to t the track or ways of the lathe-bed and having a' slotin thecenter, through whicha bolt o. passes to' hold itin position. The upperside -of this4 base is formed with a'devetailfgroove, in.

fitedpto sli @Isae-laurea passes through als-1ot'.in"-thefr' feBm al yto- A; '.Byloos'ening this' bolt. maybe -slid in the groove iIrA theframe B The general form of the frame B is circular, and it is made intwo parts B'B, held together by bolts passing through ears made for thatpurpose, as represented. One face of B B is recessed, and lugs C arecast or otherwise affixed within this recess, through which the slidesor bearers D are fitted to slide'in radiallines. A ring E E' is fittedto turn freely within the hole in B B and is held specified;

'in position by' a flange e on one side anc Wedges creams G attached tothe other, 'which cams or wedges are forced by the rotation of AE. E'between the ends `of the slides D and.

the flange on B B', and thus cause the former to move equal distancestoward the center, y

preserving in all pL 3i tions their concentricity. This ring is alsomadein two parts, the part E remaining-in the bottom half B of theVframe, and the part E lifting 0E with the other part B when the latteris opened, thereby enabling any article to be laid in position.

When the frame'B Bis again united and fastened, the ring E Eactspreciisely the.

same as :ffin one piece, being confined by B B', so that the moving onepart necessitates 'a corresponding motion of the other.

of aworm or tangent screw H,- kmounted in bearings on B and' meshingintoteeth for-med upon. the flange eef the part E. By rotating the worm H bymeans of 'a crank applied to the end of its arbor the -slides D areforced in or allowed to slide outward lto contract o'r' expand the sizeof the circle bounded by their inner ends i'n order to .lit diEe'rentsizes of l work. T wo or more sets of the slides D are provided Vofdifferent lengths, so as to'increase the range of adjustability.'

I am aware lhat cams have-heretofore been used in combination withslides arranged and operated in a somewhat similar manner in chucks andscrew-cutting machines, and I make no vclaim to such combination; but 1am not awarethat any-such combination has been heretofore arranged s0 asto allow a por- ,tion to be removed inthe mannerand for the'.pnrpose'abeve set forth. rlnherefore,

What I claim .as my-i to secure. by Letters'lateh, iss-- e` cam-frinfffElE vsimilarl constructed,.

arranged vthat the en opened for. the purpose of? insertingfaiidf re-Vmoving `the weriQ-jsub'stantiallyas herein In testimony where my name inthe witnesses.

Motion 1 is communicated to the ring E lE by means nvention, anddesireThe frame B B', made'intwo or Vmore parts',-v

of I have -hereu'ntoset presence of two subscribing

